<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
    <script src="react.js"></script>
    <script src="react-dom.js"></script>
    <script src="browser.min.js"></script>
    <script type="text/babel">
    class Popper extends React.Component{
        constructor() {
            super();
            this.state = {
                name : 'hello world',
            }
        }
        preventPop(name,e){    //事件对象e要放在最后
            e.preventDefault();
            alert(name);
        }
        render(){
            return(
                <div>
                <p>hello</p>
                <a href="https://reactjs.org" onClick={this.preventPop.bind(this,this.state.name)}>click</a>
                </div>
            )
        }
    }
    ReactDOM.render(
        <Popper />,
    document.getElementById("app")
    )
    
    
    </script>
</body>
</html>